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Physics Unit And Measurement Difficulty: Medium

What is the SI unit of wave speed?

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Which one of the following instrument is used for locating submerged objects in an ocean? Which of the following statements about the speed of sound in different mediums is/are true at 25°C? A. Speed of sound in steel is 5960 m/s. B. The speed of sound in nickel is 6240 m/s. Which one among the following components can not be developed within an ''integrated circuit"? Sound waves do not travel in Match the correct. List-I List-II a. Fathometer 1. Atmospheric pressure b. Barometer 2. Atmospheric humidity c. Hygrometer 3. Height d. Altimeter 4. Depth of sea